Need help slicing design

Hey everyone. I need some help slicing up a little template I’m toying with. I’ve seen similar designs on the web before, and I’d like to know how to make it work.

In th attached image, you’ll see that I have a diagonal pattern that is used as a background, and an outer glow on the sides (the white fading part). The problem is, how do I make this cross-resolution? The pattern and the outer glow are really confusing me…can’t stretch images, and the tiling will be pretty tricky…so any pointers?